The Mountain View company has activated the Person Finder service for other recent quakes, such as February's quake in Christchurch in Australia.

Facebook also has a standing Global Disaster Relief page to help spotlight relief efforts. Facebook also noted that the Al Jazeera English was streaming live reports from Japan right on the network's Facebook page.

Twitter users were also turning to the microblogging service for up to the second news, making #prayforjapan, #tsunami and Tokyo Disneyland the top trending topics. As Mashable.com reported, tweets from Japan were topping out at 1,200 per second.